Study On Modification Of UHMWPE And Processing Sheet By Twin Screw Extruder

The ultra high molecular weight polyethylene (UHMWPE) is new type of engineering plastics of outstanding properties. But the applications of UHMWPE are influenced by its shortages, such as the poor processing properties, the lower surface hardness and the lower thermal deformation temperature. In this paper, the flowing modification of UHMWPE is researched by adding LDPE, HDPE, PP and PA. The mechanical properties and wear performance of blend are studied with different percent flowing modification agent. And the mechanical properties, wear performance of glass bead filled UHMWPE were investigated. The mechanical properties, wearing quality and fluidity of the composites are investigated. Besides, with the adhesive-slid transition mechanism, the structure of die and the screw configuration to extrude sheet of the blend of UHMWPE are investigated. The result shows that extrusion of blend by co-rotating twin-screw extruder is effective and sheets of flatness surface and excellent finish could be produced easily.